Thomsomfeld spotted this book coming out in 2012 by Digby Smith. Bumph says
Drawn from many international sources, most not seen before in English-language publications, Armies of the Seven Years War is the definitive reference work for students, readers and enthusiasts of the period. It details the senior commanders, uniforms, weapons, equipment, artillery, strategy, tactics and combat involvement (military and naval) of the forces that fought for survival and world supremacy from 1756 to 1763. States covered include Austria, Bavaria, Britain, Brunswick, Denmark, Hanover, Hessen-Darmstadt, Hessen-Kassel, Holland, France, the Palatinate, Portugal, Prussia, Russia, Spain, Sweden, Wurttemberg and the minor contingents of the Holy Roman Empire. Coverage of the intricacies of the uniforms, colours and standards is on an unprecedented scale, many details of which are previously unpublished. The tactics of the 'horse and musket' era are examined, as is Frederick the Great's abilities as a war leader who led his armies against the rest of Europe. With over 150 illustrations and maps and drawn from wide-ranging research, Armies of the Seven Years War is an invaluable resource.